Dental vulcanizer



UNITED STATES PATENT OFFICE.

JAMES H. BEEBEE, OF ROCHESTER, ASSIGNOR TO THE BUFFALO DENTAL MANUFACTURING JOMPANY, OF BUFFALO, NEW YORK.

DENTAL'VULCANIZER.

SPECIFICATION forming part of Letters Patent No. 524,798, dated August 21, 1894. Application filed May 4, 1394.. Serial No. 510.023. woman.)

the completion of the vulcanizing process has hitherto been attended with some difficulty, as considerable power is sometimes required to loosen the cap by means of the ordinary vulcanizer Wrench which has usually been employed for this purpose. Moreover, when the packing was new and the vulcanizer leaked owing to the insufficient closure of the cap, it-was difflcult', if not impossible with the aid of the ordinary wrench to further close the cap, without first cooling the vulcanizer,

owing to the steam pressure against the cap,

which greatly increases the frictional resistance of the screw connection.

The object of my invention is to provide the vulcanizer with simple means whereby the screw cap can be sufficiently tightened, as well as released, without difficulty.

In the accompanying drawings:-Figure 1 is a side elevation of a dental vulcanizer containing my improvement. Fig. 2 is a vertical section of the same. Fig. 3 is a top plan view thereof. Fig. 4 is a horizontal section in line 4.-4, Fig. 2. Fig. 5 is a vertical section of a vulcanizing pot and cap, showing a modification of my improvement.

Like letters of reference refer to like parts 'in the several figures.

A represents the vulcanizing pot and B its screw cap or cover.

C is the jacket or casing surrounding the vulcanizing pot and having at its upper end an inwardly projecting annular flange or ring 0 upon which the pot is supported by means of its externally screw threaded rim a. The vulcanizing pot is held from turning in the jacket by lugs a formed onthe pot and interlocking with notches formed in the flange of the jacket, as shown in Figs. 2 and 4. The

screw cap is provided with a ring or flange d which surrounds the same and is arranged directly above the flange of the jacket. This ring is preferably detachable from the cap and is loosely supported upon an annular rim or shoulder b formed at the lower end of the screw cap, and the same is prevented from turning on the cap by lugs 11 arranged on the latter and engaging invnotches formed in the ring, as shown in Fig. 3. The upper or cap-ring d is provided with an annular ,row of equidistant openings d, and the lower or jacket ring 0 is provided with a similar row of openings 0, arranged in substantially the same vertical plane with the openings of the upper ring, but difiering in number from those of the upper ring, so that the greater portion of the openings of opposing sets are off-set or break coincidence vertically, similar to Vernier graduations.

I have obtained satisfactory results by providing one of the rings with twenty four openings and the other with twenty=six openings.

After screwing the cap upon the vulcanizing pot, the same is tightened by passing two rods or levers f through two pairs of offset openings of the rings, the levers being placed on diametrically opposite sides of thecap and inserted in the opposing openings in such a way that they incline toward the direction in whichthe cap is to be turned, as shown in Figs. 1 and 3. The openings of the lower ring with which the levers engage, are thus in advance of the corresponding openings of the upper ring, and upon swinging the levers toward a perpendicular position, the upper ring and the cap are turned forward, the edges of the lower openings serving as stops or ful' crums for the levers during this action. If the cap is not sufflciently tightened by a single application of the levers, the latter are inserted in another set of ofiset openings and operated in the manner above described, this operation being repeated until the cap .is properly tightened.

The cap is loosened by inserting the levers in the ofiset openings so as toincline in the opposite direction, whereby the cap is turned backward and released upon moving the levers toward a perpendicular position.

By my improved means, a powerful lever- ICO age is obtained-which enables the screwcap to bevtightene'd, as well as loosened under.

1. The combination with the vulcanizing pot, of a screw cap having a perforated flange forrturnin it and a stationar ringorflan e forth."

2.. The 1 combination with the vulcanizing potand its screw cap havinga perforated ring for turning it, of a jacket surrounding the .pot and provided below the cap-ring with a perforated ring having its openings arranged to breakcoincidence with the openings of the cap ring, substantially as. setrforth.

3. The combination with the vulcanizing pot and its screw cap, of .a perforated ring detacha-bly secured to the cap, and a jacket surrounding the vulcanizing pot and provided directly below the cap-ring with a perforated ring having its openings oifset with reference to the openings of the cap-ring, substantially as setforth.

Witness my hand this 27th day of .April,

1894. arranged adjacent'to' the perforated flange of 1 the screw'cap. and having a series of stopsforming lever fulcrums;substantial1y asset JAMES1H. BE'EBEE Witnesses:

OHARLEswM: WILLIAMS,'-. GEO. E. HARMON. 

